Corrected from:
Inverter Drives 8400 StateLine, HighLine, and TopLine from firmware version 14.00.00.00
Response of the new version?
Controller enable after mains connection of the BaseUnit is delayed.
Which products are affected?
Inverter Drives 8400 StateLine, HighLine, and TopLine with a firmware version lower than 14.00.00.00
What happens?
With mains connection of the BU, apart from the jerk in the machine, also an overcurrent limitation or overcurrent disconnection function may respond, or the mechanics may be subjected to high stress.
When does the problem occur?
After the BaseUnit is switched on (ControlUnit is supplied by 24V), the ramp function generator in the CU is enabled immediately with auto-start (C142=0), pulse enable, however, is delayed by approx. 400 ms (due to the starting routine in the BU). Therefore, after pulse enable has been executed, there is a speed step change to the ramp function generator value. This process is very distinct for short acceleration times (t< 0.8 s).
Short-term measures/recommendations?
Delay of controller enable after mains connection of the BaseUnit.
Evaluation:
If the customer uses the above settings (short acceleration times and C142 =0), the resulting jerk may damage the mechanics.
